Life is hard, you're tired, and there's disease. The strategy that works for children is to be delighted by the things that delight you.
Human beings are selfish by nature. Everything that happens to a child, you immediately grab your own child and say, "I will never let that happen to you."
It's a cliché to state that one should think like a child, but it's clear that kids know something that the world tries to make you unlearn later in life.
